I will enlist down below some of the top colleges having BSc biotechnology course in Ernakulum district...

1. Aquinas College of Education
2. Al-Ameen College , Aluva
   
3. Albio Technologies, Kalamassery
4. Presentation College of Applied Sciences
   
5. Indira Gandhi College of Arts and Science , Kothamangalam
6. Mar Athanasius College, Kothamangalam
7. Kesari Arts and Science College

Refer to the website below for more detailed information...

https://university.careers360.com/colleges/list-of-biotechnology-degree-colleges-in-kerala Best wishes Thank you.